Process for coating aluminum or aluminum alloy

Details Process for coating aluminum or aluminum alloy Process for coating aluminum or aluminum alloy

1974-11-11

1976-06-08

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

C25D 1306, C25D 1310, C25D 1320

Patent

active

039620611

ABSTRACT:
A process for coating an aluminum or aluminum alloy comprising the steps of subjecting aluminum or aluminum alloy to boehmite treatment or chemical conversion treatment, conducting electrolysis using the resulting aluminum or aluminum alloy as an electrode in an aqueous solution of a water-soluble salt of at least one oxyacid, and thereafter coating electrophoretically the aluminum or aluminum alloy with an aqueous organic coating composition containing a binder resin and a water-soluble salt of at least one oxyacid to form a resin layer, said oxyacid contained in the aqueous solution and aqueous organic coating composition being at least one oxyacid selected from the group consisting of silicic acid, boric acid, phosphoric acid, molybdic acid, vanadic acid, permanganic acid, stannic acid and tungstic acid.

REFERENCES:
patent: 2868702 (1959-01-01), Brennan
patent: 3290235 (1966-12-01), Gilchrist
patent: 3622473 (1971-11-01), Ohta et al.
patent: 3812023 (1974-05-01), Schardein et al.

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